physics

If the uncertainty in the measurement of the position of a particle is 5.0 x 10^-10m, the uncertainty in the momentum of the particle is?

A. 1.32 x 10-44Ns B. 3.30 x 10-44Ns C. 1.32 x 10-24Ns D. 3.30 x 10-24Ns Correct Answer: Option C…

4 years ago

Given that young’s modulus for aluminium is 7.0 x 10¹°Nm−² and density is 2.7 x 10³kgm−³. Find the speed of the sound produced if a solid bar is struck at one end with a hammer

A. 5.1 x 103ms-1 B. 4.2 x 103ms-1 C. 3.6 x 103ms-1 D. 2.8 x 103ms-1 Correct Answer: Option A…

4 years ago

A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked?

A. 32ms−¹ B. 50ms−¹ C. 64ms−¹ D. 100ms−¹ Correct Answer: Option D - 100ms−¹

4 years ago

An electron makes a transition from a certain energy level Ek to the ground state E0. If the frequency of emission is 8.0 x 10^14Hz. The energy emitted is?

A. 8.25 x 10-19J B. 5.28 x 10-19J C. 5.28 x 1019J D. 8.25 x 1019J Correct Answer: Option B…

4 years ago

In the calibration of an ammeter using faraday’s laws of electrolysis, the ammeter reading is kept constant at 1.2A. If 0.990g of copper is deposited in 40 minutes; the correction to be applied to the ammeter is

A. 0.03A B. 0.04A C. 0.05A D. 0.06A Correct Answer: Option C - 0.05A

4 years ago

A ray of light is incident on an equilateral triangular glass prism of refractive index 3/2. Calculate the angle through which the ray is minimally deviated in the prism?

A. 30.0° B. 37.2° C. 42.0° D. 48.6° Correct Answer: Option B - 37.2°

4 years ago

A bead traveling on a straight wire is brought to rest at 0.2m by friction. If the mass of the bead is 0.01kg and the coefficient of friction between the bead and the wire is 0.1 determine the work done by the friction?

A. 2×10‾3J B. 2×10‾3J C. 2×101J D. 2×102J Correct Answer: Option B Explanation Work done by friction = Friction force…

4 years ago

When a nucleus is formed by bringing protons and neutrons together; the actual mass of the formed nucleus is less than the sum of the masses of the energy equivalent of this mass difference is the?

A. lost energy B. work function C. binding energy D. stability energy Correct Answer: Option C - binding energy

4 years ago

The major difference between a pure semiconductor and a pure metal is that?

A. metals are harder than the semiconductor B. while the resistance of metals decreases with temperature, the reverse is the…

4 years ago

In a semi conductor junction diode; as the depletion or barrier layer is forward-biased, the layer?

A. widens B. narrows C. remains constant D. widens then narrows Correct Answer: Option C - remains constant

4 years ago
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