Advertisements
Advertisements
प्रश्न
In 10 s, charge of 25 C leaves a battery, and 200 J of energy are delivered to an outside circuit a result.
What current flows from the battery?
Advertisements
उत्तर
Given:
Time, t = 10 s
Charge, Q = 25 C
Energy delivered = Work done, W = 200 J
Using the relation, I = Q/t,
I = 25/10 = 2.5 A
So, a current of 2.5 A flows from the battery.
संबंधित प्रश्न
1 A = _________ mA
- 102
- 103
- 10-3
- 10-6
Draw the electrical symbols of the following components and state its use
Wire crossing
By what name is the physical quantity coulomb/second called?
You can given one hundred 1 Ω resistors. What is the smallest and largest resistance you can make in a circuit using these?
If the lamps are both the same in the figure given below and if A1 reads 0.50 A, what do A2, A3, A4 and A5 read?
The following circuit diagram shows three resistors 2 Ω, 4 Ω and R Ω connected to a battery of e.m.f 2V and internal resistance 3 Ω. If the main current of 0.25 A flows through the circuit, find:
- the p.d. across the 4 Ω resistors,
- the p.d. across the internal resistance of the cell,
- the p.d. across the R Ω or 2 Ω resistors, and
- the value of R.
A charge of 80 C flows in a conductor for 2 minutes.
(a) Calculate the current flowing through the conductor.
(b) If the current through a heater is 4 A what charge must be passing in 8 seconds?
Fig. shows a 3 pin plug with the cover removed. The electric cable
connected to the plug contains 3 wires with colour coded insulation namely brown, blue and green.
- Identify each of the colour coded wires by stating to which of the
terminals A, B or C in the diagram they should be connected. - Identify the terminal through which no current passes in normal
circumstances. - What is the purpose of the earthed wire connected to an electric
appliance like an electric heater? Describe how it works.
Name the principle on which a transformer works.
1 kWh = `(1 "volt" xx 1 "ampere" xx "_________")/1000`
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The resistance of the bulb
State the conditions for the flow of charge in a circuit from one point to the other.
Name any two devices, which are working on the heating effect of the electric current.
An ammeter is always placed in parallel with the circuit.
In metallic conductors, the charge carriers responsible for producing electric current are:
The direction of Direct Current (DC) is characterized as:
Common sources of Alternating Current (AC) are:
