physics

Which of the following is/are not affected by a magnetic field?

I. Neutrons II. Cathode rays III. Alpha particles A. I only B. II only C. III only D. I &…

5 years ago

Which of the following is/are not correct about isotopes of an element? The have

A. the same neutron number B. the same proton number C. same number of electrons D. same chemical properties E.…

5 years ago

Which of the following explains the concave meniscus of water in a glass tube?

A. The adhesion between water and glass is greater than the cohesion between water molecules B. The cohesion between water…

5 years ago

When sugar at the bottom of a glass of water gradually dissolves, the water level does not change applicably. Which of the following statements best describe this?

A. Water is suitable solvent for sugar B. The sugar and the water have become single solution C. The volume…

5 years ago

Which of the following particles of ray has the highest penetrating power?

A. Beta particles B. Alpha particles C. Gamma particles D. Electrons E. Neutrons Correct Answer: Option C - Gamma particles

5 years ago

Calculate the resistivity of a wire of length 2m and cross-sectional area 0.004cm² if the resistance is 3.0 Ω.

A. 0.0000267Ωcm B. 0.006Ωcm C. 0.26700Ωcm D. 0.27500Ωcm E. 0.060000Ωcm Correct Answer: Option B = 0.006Ωcm Explanation R = αL/A…

5 years ago

Which of the following statement is not correct about loaded spiral spring?

A. The extension is proportional to the load applied, provided the elastic limit is not exceeded B. If the elastic…

5 years ago

What is the effect of using split-rings in a simple d.c motor?

A. The direction of rotation of the coil is reversed B. The current in the coil flows in the same…

5 years ago

A lamp is marked 220V 60 W. Calculate the energy it would consume when connected to a 220V source for 1 hour.

A. 216000J B. 13200J C. 3600J D. 864J E. 220J Correct Answer: Option A = 216000J Explanation E = pt…

5 years ago

How long will it take to boil same quantity of water using the same heating coil but with the current doubled?

It takes 4 minutes to boil a quantity of water electrically. How long will it take to boil same quantity…

5 years ago