Title: اختيار من متعدد
Course: مختبر فيزياء عامه 2 الشعبة 10 عملي

Q: The potentiometer wire AB = 100 cm is connected to = 6 V. The length at the balance point (I_G=0), AC = L_AC = L_x = 40 cm for the unknown battery E_x.

Find E_x (in volts) .
[Image]
- 3 V
- 2.4 V
- 1.5 V
- 2.8 V
A: 2.4 V

Q: When V_AC vs the current i in the resistor R is plotted as shown in fig. Find E_x and r the internal resistance of  E_x from the graph.

E_X and r   are  .............
[Image]
- 2.3 V, 4 ohm
- 5 V, 2 ohm
- 2 V, 5 ohm
- 1V , 0.1 ohm
A: 2 V, 5 ohm

Q: The electromotive force of a cell is its terminal voltage when
- Maximum current flow through it
- no current flow through it
- Its resistance is maximum
- Its resistance is zero
A: Its resistance is zero

Q: In a potentiometer experiment, the balancing length with a cell is 240 cm. On shunting the cell with a resistance of 2 Ω  , the balancing length becomes 120 cm. The internal resistance of the cell is
- 4 Ω
- 0.5 Ω
- 2 Ω
- 1 Ω
A: 2 Ω

Q: From the following figure (Volt  ( V) versus current (I) ) The internal resistance (r) of the battery approximation  is:

[Image]
- 2.2 Ω
- -2.2 Ω
- 5.5 Ω
- -5.5 Ω
A: 2.2 Ω

Q: From the following figure (Volt  ( V) versus current (I) ) The electromotive force of the battery is:

[Image]
- 1.1 Volt
- 1.2 Volt
- 1.15 Volt
- 0.8 Volt
A: 1.15 Volt