Question is ⇒ The minimum requirements for causing flow of current are, Options are ⇒ (A) a voltage source, a resistor and a switch., (B) a voltage source and a conductor., (C) a power source and a bulb., (D) a voltage source, a conductor, an ammeter and a switch., (E) , Leave your comments or Download question paper.

Question is ⇒ The minimum requirements for causing flow of current are, Options are ⇒ (A) a voltage source, a resistor and a switch., (B) a voltage source and a conductor., (C) a power source and a bulb., (D) a voltage source, a conductor, an ammeter and a switch., (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The minimum requirements for causing flow of current are
A.	a voltage source, a resistor and a switch. [Wrong Answer]
B.	a voltage source and a conductor. [Correct Answer]
C.	a power source and a bulb. [Wrong Answer]
D.	a voltage source, a conductor, an ammeter and a switch. [Wrong Answer]
View Answer 27 -13 Explanation:- Answer : B Discuss it below : Movies & More Said on 2020-08-23 23:57:10 B !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Which of the following has negative temperature coefficient of resistance ?
Tungsten
Carbon
Nichrome
Platinum

⇒ When subjected to a transverse electric field, cathode rays move
Down the potential gradient
Up the potential gradient
Along a hyperbolic path
Along a circular path

⇒ Resistance of carbon filament lamp____as the applied voltage increases
increases
decreases
remains same
none of the above

⇒ If Two bulbs of 500W and 200 W rated at 250 V will have resistance ratio as
4 : 25
25 : 4
2 : 5
5 : 2

⇒ Resistance of 220 V, 100 W lamp will be
4.84 ω
48.4 ω
484 ω
4840 ω

⇒ An isolated conducting sphere is given a positive charge. Its mass
Increases
Decreases
Remain the same
Mass is not involved

⇒ When current flows through heater coil it glows butsupply wiring does not glow because
current through supply line flows at slower speed
supply wiring is covered with insulation layer
resistance of heater coil is more than the supply wires
supply wires are made of superior material

⇒ Seebeck effect is inverse of
Peltier effect
Joule's effect
Thomson's effect
None of these

⇒ When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
decrease
increase
remain constant
none of the above

⇒ Four 100 W bulbs are connected in parallel across 200 V supply line. If one bulb gets fused
no bulb will light.
all the four bulbs will light.
rest of the three bulbs will light.
none of the above.

⇒ A 100 watt light bulb burns on an average of 10 hours a day for one week. The weekly consumption of energy will be ____unit/s.
7
70
0.7
0.07

⇒ An electric fìlamentbulb can be worked from
D.C. supply only
AC. supply only
Battery supply only
All above

⇒ Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
Reactor
Capacitor
Inductor
Resistor

⇒ "The total electric flux through any closed surface surrounding charges is equal to the amount of charges enclosed."
The above statement is based on
Maxwell's law.
Ampere's law.
Gauss's law.
Coulomb's law.

⇒ Which of the following statements is incorrect?
Resistance is a passive element.
Inductor is a passive element.
Current source is a passive element.
Voltage source is an active element.

⇒ Electric pressure is also called
resistance
power
voltage
energy

⇒ The property of a conductor due to which it passes current is called
resistance
reluctance
conductance
inductance

⇒ Current velocity through a copper conductor is
the same as propagation velocity of electric energy
independent of current strength
of the order of a few µs/m
nearly 3x 10⁸ m/s

⇒ The thermal speed of electrons is of the order of
1 m/s
10^-3 m/s
10⁶ m/s
3 x 10⁸ m/s

⇒ The substances which have a large number of free electrons and offer a low resistance are called
insulators
inductors
semi-conductors
conductors

⇒ In a lamp load when more than one lamp are switched on the total resistance of the load
increases
decreases
remains same
none of the above

⇒ An instrument which detects electric current is known as
voltmeter
rheostat
wattmeter
galvanometer

⇒ The electrical energy required to heat a bucket of water to a certain temperature is 4 kWh. 1f the heat losses are 20 percent, the energy input is
2 kWh
3.2 kWh
5 kWh
6 kWh

⇒ When electric current passes through a metallic conductor, its temperature rises. This is due to
collisions between conduction electrons and atoms
the release of conduction electrons from parent atoms
mutual collisions between metal atoms
mutual collisions between conducting electrons

⇒ A glass rod when rubbed with silk cloth is charged because
it takes in proton
its atoms are removed
it gives away electrons
it gives away positive charge

⇒ Two wires A and B of the same material and length l and 2l have radius r and 2r respectively. The ratio of their specific resistance will be
1 : 1
1 : 2
1 : 4
1 : 8

⇒ One newton metre is same as
one watt
one joule
five joules
one joule second

⇒ Which of the following relation is incorrect?
P = VI
P = IR
P = V/R²
P = V²/R

⇒ The conductivity of a super-conductor is
Infinite
Very large
Very small
Zero

⇒ In an electric kettle water boils in 10 mjnutes. It is required to boil the boiler in 15 minutes, using same supply mains
length of heating element should be decreased
length of heating element should be increased
length of heating element has no effect on heating if water
none of the above