JavaScript is disabled on your browser. Enable JavaScript to use this site. Learn More

A 4 (F capacitor, a resistance of 2.5 M( is in series with 12 V battery. Find the time after which the potential difference across the capacitor is 3 times the potential difference across the resistor. [Given In (2)= 0.693]

13.86s

6.93s

7s

1.4s

Unit of specific resistance is ____.

ohm

ohm-s

ohm-metre

ohm per metre

A potentiometer wire, 10 m long has resistance 40 ohms. If it is put in series to a resistance 760 ohms and connected to a 2 volts battery, then potential gradient in the wire is ____.

1 x 10-2 volt/m

1 x 10-3 volt/m

1 x 10-4 volt/m

1 x 10-5 volt/m

If a resistance 5 is connected in the left gap of a meter bridge and 15 in the other gap then position of balancing point is

10 cm

20 cm

25 cm

75 cm

A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if

Both the length and the radius of the wire are halved.

Both the length and the radius of the wire are doubled

The radius of the wire is doubled

The length of the wire is doubled

The temperature coefficient of resistance of a wire is 0.00125 peroC. At 300 k, its resistance is I ohm. This resistance of the wire will be 2 ohm at.

1154oK

1100oK

1400oK

1127oK

Unit of conductance can’t be expressed in ____.

mho

(ohm)-1

siemen

ohm m-1

Which switch in the circuit when closed will produce short-circuiting?

A

B

C

None of the above

A battery of 20 cells (each having e.m.f. 1.8 volt and internal resistance 0.1 ohm) is charged by 220 volts and the charging current is 15A. The resistance to be put in the circuit is ____.

10.27 ohms

12.27 ohms

8.62 ohms

16.24 ohms

In comparing e.m.f two cells with the help of a potentiometer, at the balance point, the current flowing through the wire is taken from ____.

one of these cells

both of these cells

the battery in the circuit

none of these

13.86s

6.93s

7s

1.4s

Unit of specific resistance is ____.

ohm

ohm-s

ohm-metre

ohm per metre

A potentiometer wire, 10 m long has resistance 40 ohms. If it is put in series to a resistance 760 ohms and connected to a 2 volts battery, then potential gradient in the wire is ____.

1 x 10-2 volt/m

1 x 10-3 volt/m

1 x 10-4 volt/m

1 x 10-5 volt/m

If a resistance 5 is connected in the left gap of a meter bridge and 15 in the other gap then position of balancing point is

10 cm

20 cm

25 cm

75 cm

A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if

Both the length and the radius of the wire are halved.

Both the length and the radius of the wire are doubled

The radius of the wire is doubled

The length of the wire is doubled

The temperature coefficient of resistance of a wire is 0.00125 peroC. At 300 k, its resistance is I ohm. This resistance of the wire will be 2 ohm at.

1154oK

1100oK

1400oK

1127oK

Unit of conductance can’t be expressed in ____.

mho

(ohm)-1

siemen

ohm m-1

Which switch in the circuit when closed will produce short-circuiting?

A

B

C

None of the above

A battery of 20 cells (each having e.m.f. 1.8 volt and internal resistance 0.1 ohm) is charged by 220 volts and the charging current is 15A. The resistance to be put in the circuit is ____.

10.27 ohms

12.27 ohms

8.62 ohms

16.24 ohms

In comparing e.m.f two cells with the help of a potentiometer, at the balance point, the current flowing through the wire is taken from ____.

one of these cells

both of these cells

the battery in the circuit

none of these

The test is based on working of potentiometer, meter bridge, combination of cells,conductance,temperature co-efficient of Resistance, heating effect and time constant of R-C circuits and is very helpful for AIEEE and IIT JEE preparation.

why dont you provide with elaborate explanatiions???

WEIRD!!!!!1

3920 days 11 hours 59 minutes ago

PLEASE PROVIDE EXPLANATORY ANSWERS FOR ALL QUESTIONS ALONG WITH SHORTCUT TECHNIQUES. YHANK YOU

4269 days 23 hours 44 minutes ago

It'd be more helpful if you are giving some short explanation or related formulas along with it. Thank You

4316 days 19 hours 38 minutes ago

87 Members Recommend

880 Followers

**
PHYSICS : REVISION TEST ON TOPICS OF CLASS XII ---XIII**

10 Questions
| 1039 Attempts

**
PHYSICS : REVISION TEST ON TOPICS OF CLASS XI --XIII**

10 Questions
| 256 Attempts

**
PHYSICS : REVISION TEST ON TOPICS OF CLASS XI --XII**

10 Questions
| 389 Attempts

Post Cancel