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Physics Past Questions and Answers

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Physics Questions

Question 26:

The heat from the sun reaches the earth by the process

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A Insulation
B Precipitation
C Conduction
D Convection
E Radiation

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Question 27:

Two resistors R1 and R2 are connected in parallel, R2 being greater than R1. The combined resistance is

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A Less than R<sub style='font-size: smaller;'>1</sub>
B Greater than R<sub style='font-size: smaller;'>2</sub>
C The sum of R<sub style='font-size: smaller;'>1</sub> and R<sub style='font-size: smaller;'>2</sub>
D The difference of R<sub style='font-size: smaller;'>2</sub> and R<sub style='font-size: smaller;'>1</sub>
E Greater thanR<sub style='font-size: smaller;'>1</sub> but less than R<sub style='font-size: smaller;'>2</sub>

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Question 28:

Three 5 ohms resistors connected in parallel have a potential difference of 60v. applied across the combination. The current in each resistor is

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A 4A
B 36A
C 12A
D 24A
E 10A

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Question 29:

If NEPA charges 5k per kWhr, what is the cost of operating for 24 hours a lamp required 1A on a 200v line?

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A 24k
B 55k
C 40k
D 26k
E 32k

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Question 30:

A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on

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A The number of turns in the coil
B The strength of the magnet
C The speed at which the magnet is moved
D All of the above
E None of the above

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