C++ | MCQs

Explanation

The efficiency of a Carnot engine is given by 

Efficiency = 1 − 𝑄 rejected /𝑄 accepted

where  𝑄 accepted and  𝑄 rejected is the heat absorbed and rejected, respectively.

Explanation

The sun reaches its maximum angular distance from the equator at the "Solstice."

During the solstice, which occurs twice a year, the sun is at its highest or lowest point in the sky relative to the equator.

Explanation

The output of an OR gate will be high when any of the inputs is high.

An OR gate outputs a high signal if at least one input is high.

Explanation

The output of an XNOR (Exclusive NOR) gate will be high when the input logic levels are the same.

XNOR gates output a high signal when both inputs are either both high or both low.

Explanation

The AND gate represents a series gate.

It only outputs a high signal when all its inputs are high.

Similar to a series connection where current flows only if all conditions are met.

Explanation

Two batteries with unequal EMF can be connected only in series.

Connecting them in parallel can cause excessive current flow and potential damage.

Explanation

The meaning of the steady current is that the current is uniform all over the conductor.

Therefore, it will be constant throughout the length of the conductor.

Hence, current (i) flowing in a conductor is independent of the cross sectional area of the conductor.

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Explanation

Liquids that conduct an electric current are called electrolytes.

They contain ions that move freely.

It allowing the electrical current to pass through.

Explanation

A short circuit is an electric circuit offering little or no resistance to the flow of electrons.

It often causing excessive current flow and potential damage.

It occurs when a direct path is created, bypassing the intended load.

Explanation

A capacitor consists of two conductors separated by a non-conductive region.

It stores electrical energy in an electric field between the conductors.