Half Book 2

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Question 1 of 10 0% read

1. Which type of electromagnetic wave has the longest wavelength?

A Gamma rays

B X-rays

C Radio waves

D Ultraviolet rays

2. Which of the following is a safety precaution?

A Using bare wires

B Overloading sockets

C Proper earthing

D Wet hands operation

3. Direct current (DC) flows in:

A Both directions alternately

B One direction only

C Random directions

D Circular paths only

4. To convert a galvanometer into an ammeter, we connect:

A High resistance in series

B Low resistance in parallel

C High resistance in parallel

D Low resistance in series

5. If voltage across a resistor is doubled, the current will:

A Remain same

B Become half

C Double

D Become zero

6. Increasing the number of turns in a coil will:

A Decrease induced emf

B Have no effect

C Increase induced emf

D Stop induction

7. An LED emits light when it is:

A Reverse biased

B Forward biased

C Unbiased

D Overheated

8. To convert a galvanometer into a voltmeter, we connect:

A Low resistance in parallel

B Low resistance in series

C High resistance in series

D High resistance in parallel

9. Which safety device automatically breaks the circuit during overload?

A Switch

B MCB

C Plug

D Socket

10. Who discovered the atomic nucleus through the gold foil experiment?

A J.J. Thomson

B Ernest Rutherford

C Niels Bohr

D James Chadwick

Half Book 2

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