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Under what conditions will a converging lens form a virtual image?

asked Oct 19, 2017 in Physics by shamroz (41.5k points)

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What do you understand by analogue and digital quantities?

asked Oct 25, 2017 in Physics by sonia (36.5k points)

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What is NAND gate? Give its symbol and truth table.

asked Oct 25, 2017 in Physics by sonia (36.5k points)

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Define the term time period and frequency.

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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Is there any difference between echo and reflection of sound? Explain.

asked Oct 17, 2017 in Physics by sonia (36.5k points)

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What do you mean by conventional current? Explain.

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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Define electronics.

asked Oct 25, 2017 in Physics by sonia (36.5k points)

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If a high-voltage power line fell across your car while you were in the car, why should you not come out of the car?

asked Oct 23, 2017 in Physics by sonia (36.5k points)

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Is the presence of charge necessary for the existence of electrostatic potential?

asked Oct 23, 2017 in Physics by sonia (36.5k points)

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State and explain Joule's law. ,

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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How is energy dissipated in a resistance? Explain.

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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How would you define potential difference between two points? Define its unit.

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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If the length of a simple pendulum is doubled what will be the change in its time period?

asked Oct 16, 2017 in Physics by shamroz (41.5k points)

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What is meant by potential difference and electromotive force (emf)?

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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1 answer 187 views

How does short circuit occur and how can it be avoided?< .

asked Oct 23, 2017 in Physics by sonia (36.5k points)

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Define the terms resolving power and magnifying power or angular magnification.

asked Oct 18, 2017 in Physics by shamroz (41.5k points)

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1 answer 137 views

What is an AND operation? Write down its truth table.

asked Oct 25, 2017 in Physics by shamroz (41.5k points)

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How can the cost of electricity consumed in a house be calculated?

asked Oct 23, 2017 in Physics by shamroz (41.5k points)

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Explain why, a glass rod can be charged by rubbing when held by hand.

asked Oct 23, 2017 in Physics by sonia (36.5k points)

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What do you mean by binary variables?

asked Oct 25, 2017 in Physics by shamroz (41.5k points)

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