The pressure of an ideal gas is doubled during a process in which the energy given up as heat by the gas equals the work done on the gas. as a result, the volume is : (a) doubled (b) halved (c) unchanged

So volume is halved

Explanation:

As we know that heat energy given to the gas is equal to the work done

so as per first law of thermodynamics we know that

now we know that

so we have

so we have temperature of the gas is constant

so it is an isothermal process

so here we can say

so here we can say

so we have

the first, second, and fifth options

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.