physics

Two parallel conductors carry equal currents in the same direction. Which of the following statement is not a correct observation?

A. Each of the conductors will experience a force B. Each of the conductors can move C. The forces on…

5 years ago

A battery of emf 24V and internal resistance 4Ω is connected to a resistor of 32Ω. What is the terminal p.d of the battery?

A. 24.0V B. 21.3V C. 16.0V D. 2.7V E. 2.0V Correct Answer: Option B = 21.3V Explanation E = V…

5 years ago

A cell can supply current of 0.8A and 0.4A through a 2Ω and a 3Ω resistors respectively. Calculate the internal resistance of the cell.

A. 0.2Ω B. 0.4Ω C. -1.0Ω D. 3.0Ω E. 9.0Ω Correct Answer: Option C = -1.0Ω

5 years ago

Local action is normally prevented from taking place in a simple electric cell by?

A. introducing an oxidizing agent into the acid B. not drawing current continuously for long periods C. amalgamating the surface…

5 years ago

A transformer with 55500 turns in its primary is used between a 240V a. c supply and a 120V kettle. Calculate the number of turns in the secondary

A. 11000 B. 2750 C. 460 D. 232 E. 10 Correct Answer: Option B = 2750 Explanation Ep/Es = np/ns…

5 years ago

If the leaves a positively charged electroscope collapse completely as an object is brought near the cap of the electroscope, the objects possesses?

A. an equal amount of positive charge B. less amount of negative charge C. no charge D. a positive charge…

5 years ago

A sounding tuning fork is brought near the end of a pipe containing an air column and the loudness of the sound increases. This effect is due to

A. diffraction B. an echo C. resonance D. interference E. reverberation Correct Answer: Option C - resonance

5 years ago

A boy standing a distance from the foot of a tall cliff claps his hands and hears an echo 0.5s later. If the speed of sound is 340ms1, how far is he from the cliff?

A. 17m B. 34m C. 85m D. 170m E. 680m Correct Answer: Option C - 85m Explanation X = vt/2…

5 years ago

Which of the following statement s is/are not correct about a standing wave?

I. It is formed by the superimposition of two progressive waves traveling in the same direction II. All points on…

5 years ago

A source of sounds produces waves in air of wavelength1.65m. If the speed of sound in air is 330ms-1 the period of vibration in seconds is?

A. 200 B. 2.0 C. 0.5 D. 0.02 E. 0.005 Correct Answer: Option E - 0.005 Explanation T = λ/v…

5 years ago
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