Internal resistance

It is an energy supply by a battery/ electrical source to a coulumb unit of charge.

This refers to

• Potential difference

• Internal resistance

• Electromotive force

• Current

Which is a true statement?

• No sources of emf have internal resistance

• Some sources of emf have internal resistance

• Most sources of emf have internal resistance

• All sources of emf have internal resistance

The cell has internal resistance, r, and electromotive force of 1.5 V.
What is the reading of voltmeter when the switch is closed?

• More than 3.0 V
• Less than 1.5 V
• More than 1.5 V
• 1.5 V

The gradient of this line represents the

• internal resistance

• emf of the cell

• power of the cell

• resistance of the circuit

The "y" intercept of this graph represents the

• internal resistance

• total resistance

• total voltage

• emf of the cell

rheostat

• resistor

• thermister

• variable capacitor

• variable resistor

potentiometer

• resistor

• thermister

• variable capacitor

• variable resistor

From diagram, what 1.5 V refers to

• Internal resistance

• Potential difference

• Electromotive force

• Voltage

From the graph, what is given by the gradient?

• Resistance

• Internal resistance

• Potential difference

• Electromotive force

What is the electromotive force of battery?

• 0.5 V

• 1.0 V

• 1.5 V

• 2.0 V