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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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1 answer 230 views

Each capacitor in parallel combination has equal potential difference between its two plates. Justify the statement.

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

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1 answer 178 views

What is the function of electromagnetism in television?

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

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What is the difference between conductors and insulators?

asked Oct 23, 2017 in Physics by sonia (36.5k 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 do you mean by conventional current? Explain.

asked Oct 23, 2017 in Physics by shamroz (41.5k 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 electronics.

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

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1 answer 214 views

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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1 answer 210 views

How is energy dissipated in a resistance? Explain.

asked Oct 23, 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 512 views

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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1 answer 212 views

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 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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1 answer 423 views

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 152 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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1 answer 199 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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Does a ball placed in a bowl executes SHM. Explain.

asked Sep 26, 2017 in Physics by sonia (36.5k 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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