Advertisements
Advertisements
Question
Fill in the blank:
To increase the effective resistance in a circuit the resistors are connected in _____________.
Solution
To increase the effective resistance in a circuit, the resistors are connected in series
APPEARS IN
RELATED QUESTIONS
Calculate the number of electrons constituting one coulomb of charge.
How many milliamperes as there in 1 ampere?
How many microamperes are there in 1 ampere?
Compare how an ammeter and a voltmeter are connected in a circuit.
Fill in the folloing blank with suitable words:
Current is measured in ............... using an ............... placed in ............... in a circuit.
Why should the resistance of:
an ammeter be very small?
Which unit could be used to measure current?
(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω, 0.5 Ω and 0.12 Ω. How much current would flow through the 12 Ω resistor?
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
Draw a circuit diagram showing two lamps, one cell and a switch connected in series.
How can you change the brightness of the lamp?
What would be the danger involved in replacing a blown fuse with the one which would carry a large current?
State whether the current is a scalar or vector?
Answer the following question.
An electric lamp of resistance 20 Ω and a conductor of resistance 4 0 are connected to a 6 V battery as shown in the circuit. Calculate: 
(a) the total resistance of the circuit,
(b) the current through the circuit,
(c) the potential difference across the (i) electric lamp and (ii) conductor, and
(d) power of the lamp.
State the condition when it is advantageous to connect cells in series.
What is the rate at which charges flow past a point on a circuit?
