1

JEE Advanced 2017 Paper 2 Offline

MCQ (Single Correct Answer)

+3

-0

Consider a simple RC circuit as shown in Figure 1.

Process 1 : In the circuit the switch S is closed at t = 0 and the capacitor is fully charged to voltage V

Process 2 : In a different process the voltage is first set to $${{{V_0}} \over 3}$$ and maintained for a charging time T >> RC. Then, the voltage is raised to $${{2{V_0}} \over 3}$$ without discharging the capacitor and again maintained for a time T >> RC. The process is repeated one more time by raising the voltage to V

These two processes are depicted in Figure 2.

Process 1 : In the circuit the switch S is closed at t = 0 and the capacitor is fully charged to voltage V

_{0}(i.e. charging continues for time T >> RC). In the process some dissipation (E_{D}) occurs across the resistance R. The amount of energy finally stored in the fully charged capacitor is E_{C}.Process 2 : In a different process the voltage is first set to $${{{V_0}} \over 3}$$ and maintained for a charging time T >> RC. Then, the voltage is raised to $${{2{V_0}} \over 3}$$ without discharging the capacitor and again maintained for a time T >> RC. The process is repeated one more time by raising the voltage to V

_{0}and the capacitor is charged to the same final voltage V_{0}as in Process 1.These two processes are depicted in Figure 2.

In Process 1, the energy stored in the capacitor E

_{C}and heat dissipated across resistance E_{D}are related by2

JEE Advanced 2017 Paper 2 Offline

MCQ (Single Correct Answer)

+3

-0

Consider a simple RC circuit as shown in Figure 1.

Process 1 : In the circuit the switch S is closed at t = 0 and the capacitor is fully charged to voltage V

Process 2 : In a different process the voltage is first set to $${{{V_0}} \over 3}$$ and maintained for a charging time T >> RC. Then, the voltage is raised to $${{2{V_0}} \over 3}$$ without discharging the capacitor and again maintained for a time T >> RC. The process is repeated one more time by raising the voltage to V

These two processes are depicted in Figure 2.

Process 1 : In the circuit the switch S is closed at t = 0 and the capacitor is fully charged to voltage V

_{0}(i.e. charging continues for time T >> RC). In the process some dissipation (E_{D}) occurs across the resistance R. The amount of energy finally stored in the fully charged capacitor is E_{C}.Process 2 : In a different process the voltage is first set to $${{{V_0}} \over 3}$$ and maintained for a charging time T >> RC. Then, the voltage is raised to $${{2{V_0}} \over 3}$$ without discharging the capacitor and again maintained for a time T >> RC. The process is repeated one more time by raising the voltage to V

_{0}and the capacitor is charged to the same final voltage V_{0}as in Process 1.These two processes are depicted in Figure 2.

In Process 2, total energy dissipated across the resistance E

_{D}is3

IIT-JEE 2010 Paper 1 Offline

MCQ (Single Correct Answer)

+3

-1

An AC voltage source of variable angular frequency $$\omega$$ and fixed amplitude V_{0} is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When $$\omega$$ is increased

4

IIT-JEE 2007 Paper 2 Offline

MCQ (Single Correct Answer)

+3

-1

STATEMENT 1

A vertical iron rod has a coil of wire wound over it at the bottom end. An alternating current flows in the coil. The rod goes through a conducting ring as shown in the figure. The ring can float at a certain height above the coil.

Because

STATEMENT 2

In the above situation, a current is induced in the ring which interacts with the horizontal component of the magnetic field to produce an average force in the upward direction.

Questions Asked from Alternating Current (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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