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Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 45 (25 MCQs)

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1. Two wires of same metal have the same length but their cross-sections are in the ratio 3:1. They are joined in series. The resistance of the thicker wire is 10$\Omega$. The total resistance of the combination in $\Omega$ is:
2. An electrical junction has four wires A, B, C and D connected to it. Wire A carries 7A going in, wire B carries 5 A going out and wire C carries 2 A going in. What does wire D carry?
3. In a circuit the energy flows from which terminal to the rest of the component?
4. What is the formula for calculating the total resistance of resistors in series?
5. The sensitivity of potentiometer can be increased by
6. Common forms include lightning or a shock when you touch a doorknob
7. What are the two types of currents?
8. If one burned out bulb causes all of the lights to fail in a circuit, what might you conclude?
9. If V is the potential difference across the ends of a resistor and I is the current flowing through the resistor, state the formula that can be used to determine the resistance R.
10. To convert a moving coil galvanometer into a voltmeter ..... is connected.
11. The potential difference between the terminals of a 12.0 V battery is 11 V when it is connected with another resistance of 11 $\Omega$ in series. What is the internal resistance of the battery? (Hint-Use Terminal Potential = EMF-Current*Internal Resistance)
12. The voltage difference between the live and neutral wires is about .....
13. The tendency for a material to oppose the flow of electrons$_{}$
14. The potential difference between the terminals of a battery is 10V and internal resistance 1 $\Omega$
15. Ohm's law is applicable only when .....
16. Which of the following belong to AC current in India?
17. Superposition theorem states that the response in any element is the ..... of the responses that can be expected to flow if each source acts independently of other sources.
18. What is the magnitude of current in our nervous system?
19. Positive Thomson effect is observed in
20. A certain wire has resistance R. Another wire, of the same material, has half the length and half the diameter of the first wire. The resistance of the second wire is:
21. Nichrome or Manganin is widely used in wire bound standard resistors because of their.
22. In, current flows more easily because electrons are more loosely bound to
23. Electric force is a type of
24. If 5J of work is required to shift 10 C charge from one place to another place then potential energy difference is
25. The stronger the current, the ..... the bulb.
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