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Latest BTSC Laboratory Assistant Electronics Exam Question (Objective Questions), MCQ in English

Subjects : Electronics

Question Bank BTSC Laboratory Assistant (Electronics) Exam - English
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Electronics

Question 1Single Answer
What is the theoretical limit of the speedup provided by Grover's algorithm for searching an unsorted database of N items?
  1. AN
  2. Blog(N)
  3. Csqrt(N)
  4. DN2
Question 2Single Answer
What is the total resistance of resistors connected in series?
  1. AThe reciprocal of the sum of individual resistances.
  2. BThe sum of the individual resistances.
  3. CThe product of the individual resistances divided by their sum.
  4. DThe smallest individual resistance.
Question 3Single Answer
What is the total resistance of resistors connected in parallel?
  1. AThe sum of the individual resistances.
  2. BThe product of the individual resistances divided by their sum.
  3. CThe reciprocal of the sum of the reciprocals of individual resistances.
  4. DThe largest individual resistance.
Question 4Single Answer
What is the formula for calculating electrical power (P) in a DC circuit?
  1. AP = V / I
  2. BP = V * I
  3. CP = I / V
  4. DP = V / R
Question 5Single Answer
What is the energy consumed by a device with a power rating of 100 Watts operating for 1 hour?
  1. A100 Joules
  2. B1000 Joules
  3. C100 Watt-hours
  4. D3600 Joules
Question 6Single Answer
What is a voltage source?
  1. AA device that provides a constant current.
  2. BA device that provides a constant voltage.
  3. CA device that opposes the flow of current.
  4. DA device that stores electrical energy.
Question 7Single Answer
What is a current source?
  1. AA device that provides a constant voltage.
  2. BA device that provides a constant current.
  3. CA device that stores electrical energy.
  4. DA device that dissipates electrical energy.
Question 8Single Answer
What is Kirchhoff's Current Law (KCL)?
  1. AThe sum of voltages around a closed loop is zero.
  2. BThe current entering a node is equal to the current leaving the node.
  3. CVoltage is directly proportional to current.
  4. DPower is equal to the product of voltage and current.
Question 9Single Answer
What is Kirchhoff's Voltage Law (KVL)?
  1. AThe current entering a node is equal to the current leaving the node.
  2. BThe sum of voltages around a closed loop is zero.
  3. CCurrent is directly proportional to voltage.
  4. DResistance is equal to voltage divided by current.
Question 10Single Answer
What is the purpose of a capacitor in an electrical circuit?
  1. ATo store electrical energy in an electric field.
  2. BTo resist the flow of current.
  3. CTo provide a path for direct current.
  4. DTo amplify the voltage.
Question 11Single Answer
What is the purpose of an inductor in an electrical circuit?
  1. ATo store electrical energy in a magnetic field.
  2. BTo block the flow of alternating current.
  3. CTo provide a path for direct current.
  4. DTo filter out high-frequency signals.
Question 12Single Answer
What is the frequency of a standard AC power supply in India?
  1. A50 Hz
  2. B60 Hz
  3. C100 Hz
  4. D120 Hz
Question 13Single Answer
In an AC circuit, what is the term for the opposition to the flow of current?
  1. AResistance
  2. BReactance
  3. CImpedance
  4. DConductance
Question 14Single Answer
What is the phase difference between voltage and current in a purely resistive AC circuit?
  1. A90 degrees
  2. B180 degrees
  3. C0 degrees
  4. D45 degrees
Question 15Single Answer
What is the phase difference between voltage and current in a purely inductive AC circuit?
  1. AVoltage leads current by 90 degrees.
  2. BCurrent leads voltage by 90 degrees.
  3. CThey are in phase.
  4. DThey are 180 degrees out of phase.
Question 16Single Answer
What is the phase difference between voltage and current in a purely capacitive AC circuit?
  1. AVoltage leads current by 90 degrees.
  2. BCurrent leads voltage by 90 degrees.
  3. CThey are in phase.
  4. DThey are 180 degrees out of phase.
Question 17Single Answer
What is the Thevenin's theorem used for in circuit analysis?
  1. ATo simplify a complex network into a single voltage source and series resistance.
  2. BTo find the current through a specific branch of a circuit.
  3. CTo analyze AC circuits.
  4. DTo calculate the power dissipated in a circuit.
Question 18Single Answer
What does Thevenin's equivalent circuit consist of?
  1. AA single current source in parallel with a resistance.
  2. BA single voltage source in series with a resistance.
  3. CMultiple voltage sources and resistors.
  4. DOnly resistors.
Question 19Single Answer
How do you find the Thevenin voltage (Vth) across a load in a circuit?
  1. ABy short-circuiting the load terminals.
  2. BBy measuring the voltage across the open-circuited load terminals.
  3. CBy calculating the current through the load.
  4. DBy applying Kirchhoff's laws to the entire circuit.
Question 20Single Answer
How do you find the Thevenin resistance (Rth) of a circuit?
  1. ABy removing all voltage sources and short-circuiting all current sources, then finding the equivalent resistance looking into the load terminals.
  2. BBy measuring the voltage across the load.
  3. CBy calculating the current through the load.
  4. DBy adding up all the resistances in the circuit.
Question 21Single Answer
What is Norton's theorem used for in circuit analysis?
  1. ATo simplify a complex network into a single voltage source and series resistance.
  2. BTo simplify a complex network into a single current source and parallel resistance.
  3. CTo analyze transient responses in circuits.
  4. DTo calculate the power factor of an AC circuit.
Question 22Single Answer
What does Norton's equivalent circuit consist of?
  1. AA single voltage source in series with a resistance.
  2. BA single current source in parallel with a resistance.
  3. CMultiple current sources and resistors.
  4. DOnly resistors.
Question 23Single Answer
How do you find the Norton current (In) in a circuit?
  1. ABy measuring the voltage across the open-circuited load terminals.
  2. BBy measuring the current through the short-circuited load terminals.
  3. CBy calculating the equivalent resistance.
  4. DBy applying Kirchhoff's laws to the entire circuit.
Question 24Single Answer
How do you find the Norton resistance (Rn) of a circuit?
  1. ABy measuring the voltage across the load.
  2. BBy removing all voltage sources and short-circuiting all current sources, then finding the equivalent resistance looking into the load terminals.
  3. CBy calculating the current through the load.
  4. DBy adding up all the resistances in the circuit.
Question 25Single Answer
In a series resonant circuit, the impedance is:
  1. AMaximum
  2. BEqual to the capacitive reactance
  3. CMinimum (equal to the resistance)
  4. DEqual to the inductive reactance
Question 26Single Answer
Which device is primarily used to connect multiple networks and route data packets between them?
  1. ASwitch
  2. BRouter
  3. CHub
  4. DModem
Question 27Single Answer
Which device is used to connect a local area network (LAN) to the internet?
  1. ARouter
  2. BSwitch
  3. CModem
  4. DBridge
Question 28Single Answer
Which of the following devices is used to forward data packets based on MAC addresses?
  1. ARouter
  2. BSwitch
  3. CBridge
  4. DHub
Question 29Single Answer
Which of the following is NOT a function of a router?
  1. AAssign IP addresses to devices
  2. BForward data packets based on IP address
  3. CForward data packets based on MAC address
  4. DConnect different networks
Question 30Single Answer
Which device is used to connect two different networks and operates at the data link layer?
  1. ASwitch
  2. BRouter
  3. CBridge
  4. DHub
Question 31Single Answer
Which of the following is the main purpose of a modem?
  1. ATo connect devices within a network
  2. BTo connect a local network to the internet
  3. CTo filter malicious data
  4. DTo forward data packets
Question 32Single Answer
Which device operates at the physical layer and forwards data in the form of electrical signals?
  1. ARouter
  2. BHub
  3. CSwitch
  4. DModem
Question 33Single Answer
Which of the following is used for connecting different network segments and can operate at both the data link and network layers?
  1. ASwitch
  2. BRouter
  3. CBridge
  4. DGateway
Question 34Single Answer
Which device divides a large network into smaller subnetworks (subnets)?
  1. ASwitch
  2. BRouter
  3. CHub
  4. DModem
Question 35Single Answer
What is the main function of a network switch?
  1. ATo connect different networks
  2. BTo forward data packets based on IP addresses
  3. CTo forward data packets based on MAC addresses
  4. DTo filter network traffic
Question 36Single Answer
What is the primary function of the CPU (Central Processing Unit)?
  1. ATo store data permanently
  2. BTo perform arithmetic and logical operations
  3. CTo transfer data between different devices
  4. DTo display output on the monitor
Question 37Single Answer
Which component on the motherboard is responsible for connecting the CPU to the memory and other components?
  1. ANorthbridge
  2. BSouthbridge
  3. CPower supply
  4. DHeat sink
Question 38Single Answer
What type of memory is used to store the BIOS (Basic Input/Output System) in a computer?
  1. ARAM
  2. BROM
  3. CFlash memory
  4. DCache memory
Question 39Single Answer
Which type of memory is temporary and loses its contents when the power is turned off?
  1. AROM
  2. BRAM
  3. CFlash memory
  4. DEEPROM
Question 40Single Answer
What is the purpose of the motherboard’s chipset?
  1. ATo store operating system files
  2. BTo provide power to the CPU
  3. CTo manage data flow between the CPU, RAM, and other peripherals
  4. DTo perform calculations
Question 41Single Answer
Which type of memory is faster and located closer to the CPU?
  1. ARAM
  2. BCache memory
  3. CHard drive
  4. DROM
Question 42Single Answer
Which component is responsible for cooling the CPU?
  1. AHeat sink
  2. BRAM
  3. CFan
  4. DPower supply
Question 43Single Answer
What is the role of the power supply unit (PSU) in a computer?
  1. ATo store data
  2. BTo convert electrical power from the outlet to usable power for the computer
  3. CTo manage the CPU’s data
  4. DTo regulate the temperature of the CPU
Question 44Single Answer
Which of the following types of memory is non-volatile and can be electrically erased and reprogrammed?
  1. AROM
  2. BRAM
  3. CFlash memory
  4. DCache memory
Question 45Single Answer
Which part of the CPU is responsible for fetching instructions from memory?
  1. AControl Unit
  2. BArithmetic Logic Unit (ALU)
  3. CRegister
  4. DCache
Question 46Single Answer
Which device is used to amplify or regenerate signals in a network to extend the distance over which data can travel?
  1. ASwitch
  2. BRouter
  3. CRepeater
  4. DModem
Question 47Single Answer
Which of the following is used to establish a wireless local area network (WLAN)?
  1. ARouter
  2. BWireless Access Point (WAP)
  3. CHub
  4. DBridge
Question 48Single Answer
What type of network topology is represented by a central hub that connects all devices in a star configuration?
  1. ARing
  2. BStar
  3. CBus
  4. DMesh
Question 49Single Answer
In which network device is the packet switched on the basis of IP address?
  1. ARouter
  2. BSwitch
  3. CHub
  4. DModem
Question 50Single Answer
Which network topology connects all devices in a single line, passing data from one device to the next?
  1. AStar
  2. BBus
  3. CMesh
  4. DRing
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