Question

1. an open component in an rl parallel branch

a measures 0 volts across it

b causes maximum current

c causes current to increase

d measures the applied voltage across it

Explanation:

In an RL parallel circuit, when a component is open, the voltage across an open - circuit component is equal to the applied voltage. This is because in a parallel circuit, the voltage across each parallel branch is the same as the source voltage. If a component in a parallel branch is open, the voltmeter connected across it will measure the source voltage.

• Option a: In a parallel circuit, 0 volts across an open - component is incorrect. In a parallel RL circuit, the voltage across the branch (even if one component is open) is the applied voltage.
• Option b: An open component in a parallel branch does not cause maximum current. In fact, the current through the open branch is 0, and the total current (sum of currents in non - open branches) is less than the current when all branches are conducting.
• Option c: An open component in a parallel branch causes the total current to decrease (since the current through the open branch is 0), not increase.
• Option d: In a parallel circuit, the voltage across each branch is equal to the applied voltage. When a component in an RL parallel branch is open, the voltage across that open component is the applied voltage.

Answer:

d. measures the applied voltage across it