Advertisements
Advertisements
प्रश्न
Match the pairs.
| ‘A’ Group | ‘B’ Group |
| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
Advertisements
उत्तर
| ‘A’ Group | Answer |
| 1. Free electrons | c. Weakly attached |
| 2. Current | a. V/R |
| 3. Resistivity | d. VA/LI |
| 4. Resistances in series | b. Increases the resistance in the circuit |
APPEARS IN
संबंधित प्रश्न
What is the unit of electric current?
A Radio Set Draws a Current of 0.36 a for 15 Minutes. Calculate the Amount of Electric Charge that Flows Through the Circuit.
V1, V2 and V3 are the p.ds. across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5 A.
Which one of the columns (a) to (d) shows the correct values of V1, V2 and V3measured in volts?
`V_1` `V_2` `V_3`
(a) 1.0 2.0 3.0
(b) 5.0 10.0 15.0
(c) 5.0 2.5 1.6
(d) 4.0 4.0 2.0
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?
Define the term resistivity.
Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω
A wire of length 5 m has a resistance of 2.0 Ω calculate:
(a) the resistance of wire of length 1 m
(b) the equivalent resistance if two such wires each of length 2 m are joined in parallel.
(c) the resistance of 1 m length of wire of same material but of half diameter.
If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
Complete the following sentence:
A fuse is connected in ........... with the ......... wire.
Find the effective resistance in the following circuit diagrams (Fig.):
Two cells each having an e.m.f. of 2 V and an internal resistance of 2Ω are
connected (a) In series, and ( b) In para 1le l as shown in fig. . What is the
current flowing through the cir cu it in each_ case?
An electric oven is rated as 1.5 kW, 250 V. If it is connected to a 250 V mains, calculate the
(a) Current drawn,
(b) Energy consumed in 20 hours,
(c) Cost of energy consumed in 20 hours at the rate of Re. 1 per unit.
Fig . shows the core of a transformer and i ts input and output connections
State the material used for the core and describe th e structure of the core.
(a) Use the values given in the diagram to calculate the turns ratio for the transformer and connections, labeling all parts of the diagram .
(b) If a current of 2 A is taken from th e output, calculate th e current in the input circuit (Assume the transformer to be ideal ).
Define the term kilowatt - hour and state its value in S.I. unit.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
An electric bulb is marked 100 W, 250 V. How much current will the bulb draw if connected to a 250 V supply?
Kilowatt hour is the unit of
Which of the following represents voltage?
The flow of electric charge per unit time is called potential difference.
What is the rate at which charges flow past a point on a circuit?
