Three identical resistors are connected across a voltage source V such that one of them is in parallel with other two, which are connected in series as shown. The power dissipated through the first one, compared to the power dissipated by each of the other two is _______.
BHalf as much
CTwice as much
DFour times as much
it should be c
What is the function of part P of a mango fruit?
A It gives sweet taste to the fruit.
B It helps in ripening of fruit.
C It gives rise to a new mango plant.
D None of these
Amit celebrates his birthday on 28th September 20XX. If the day before yesterday was Amit's birthday, then today is________.
In a pressure-kerosene stove,
(i) We pump kerosene and convert it into vapours.
(ii) The vapours are then ignited.
Which of the following is true about the above statements?
A (i) is a chemical change; (ii) is a physical change.
B (i) is a physical change; (ii) is a chemical change.
C Both (i) and (ii) are physical changes.
D Both (i) and (ii) are chemical changes.
Which of the following statements is correct about the given changes?
(i) Drawing copper into a wire
(ii) Breaking of a glass
(iii) Heating an iron nail till red hot
(iv) Inflating a basketball
A (i) and (ii) are chemical changes while (iii) and (iv) are physical changes.
B (ii) and (iii) are chemical changes while (i) and (iv) are physical changes.
C All are physical changes.
D All are chemical changes.
Two boys are standing in front of
a plane mirror as shown in the figure. If boy II walks 7 m towards boy I, then how far would the image of boy II appear to boy I?
can you please explain it properly. In the question, u have shown that boy 2 walks 7 meters towards boy 1. So then he would have been 5 meters away from boy 1. 12-7=5 2=7. In the solution, u have shown. 12-5=7 2=9. If the answer is 9 as u have shown, how will the boy 2 if went 7 meters to the boy 1 be away from the mirror by 9 Meters
A speed-time (v-t) graph of an object is shown in the figure.
Which of the following best describes the graph?
AThe object drops through vacuum.
BThe object drops through air.
CThe object is being thrown downwards through vacuum.
DThe object is being thrown downwards through air.