Ohm’s Law for Closed Circuit

In the opposite electric circuit when the switch S is closed, then the readings of the voltmeter and ammeter ..……….., ………………. respectively.

• decreases, decreases

• decreases, increases

• increases, decreases

• increases, increases

The opposite graph represents the relation between the potential difference across the terminals of a battery (V) and the current intensity (I) that passes through it, then:

(i) The internal resistance of the battery is ..………..

(ii) The emf of the battery is ……………

• 1 Ω

• 2 Ω

• 0.45 Ω

• 0.9 Ω

The opposite graph represents the relation between the potential difference across the terminals of a battery (V) and the current intensity (I) that passes through it, then: The emf of the battery is ……………

• 7 V

• 7.5 V

• 8 V

• 9 V

In the electric circuit shown in the figure, if the reading of the ammeter is 2 A, the reading of the voltmeter is ………………….

• 2 V

• 1 V

• 4 V

• 5 V

A battery connected with a resistor R so the current intensity is I, when another resistance 0.5 R is connected with the first resistance, the current increases to the double.

Calculate the internal resistance of the battery in term of R.

• R

• 1/2 R

• 1/3 R

• 1/4 R

In the opposite electric circuit, if the voltmeter reading is 6 V, the resistance R equals ..........

• 2 Ω

• 3 Ω

• 4.8 Ω

• 6 Ω

In the circuit shown in the figure, the potential difference between a and c equals ……………………..

• 25 V

• 27 V

• 15 V

• 10 V

In the opposite electric circuit when the switch K is closed, then the ammeter (A) and voltmeter (V) readings are .……………… and …………… respectively

• decreases, decreases

• decreases, increases

• increases, decreases

• increases, increases

From the opposite electric circuit, If V_B= 28 V and the internal resistance of the battery is 4/7 Ω, calculate the readings of the
ammeters (A₁) & (A₂)

• 3 A, 6 A

• 1 A, 4 A

• 4 A, 1 A

• 6 A, 3 A

• 7 A, 7 A

The opposite figure represents a part of an electric circuit, find the reading I₁ and I₂

• 5 A, 15 A

• 2.5 A, 2.5 A

• 15 A, 5 A

• 5 A, 5 A