physics

Which of the following factors will increase the sensitivity of moving coil meter?

A. strong spring B. low numbers of turns C. small area of coil D. soft iron core Correct Answer: Option…

6 years ago

Which of the following factors does not affect the electric resistance of wire?

A. length B. mass C. temperature D. cross-sectional area Correct Answer: Option B B. mass

6 years ago

In the wiring of houses, the fuse is connected to the wire coloured?

A. blue B. brown C. yellow D. yellow and green Correct Answer: Option B B. brown

6 years ago

Determine the potential difference. V across the parallel resistors

A. 2.0V B. 2.3V C. 3.0V D. 0.7V Correct Answer: Option B B. 2.3V Explanation V = IR = 0.97…

6 years ago

Use the diagram below to calculate the current, I.

A. 0.60A B. 0.97A C. 1.03A D. 5.00A Correct Answer: Option B B. 0.97A Explanation 1/R=1/R1+1/R2 = 1/6+1/4 R =…

6 years ago

Capacitors are used in the following devices, except?

A. water pumping machines B. ceiling fans C. electric irons D. television sets Correct Answer: Option C C. electric irons

6 years ago

A positively charged glass rod is placed near the cap of a positively charged electroscope. The divergence of the leaf is observed to

A. decrease B. increase C. remain the same D. increase and collapse immediately Correct Answer: Option B B. increase

6 years ago

As the air column of length L in an air pipe decreases, the frequency of the stationary wave emitted?

A. decreases B. increases C. varies as L² D. varies as √L Correct Answer: Option A A. decreases

6 years ago

The amplitude of a sound wave determines its?

A. frequency B. quality C. loudness D. pitch Correct Answer: Option C C. loudness

6 years ago