Take a squared paper and arrange 48 counters on it in different number of rows as shown below.


What do you observe? As R increases, C decreases.
Is `R_3 : R_4 = C_4 : C_3`?

Take a squared paper and arrange 48 counters on it in different number of rows as shown below. What do you observe? As R increases, C decreases. Is R_1 : R_2 = C_2 : C_1 ?

Let A(4,2),B(6,5) and C(1,4) be the vertices of triangleABC .(iv)What do you observe?

What is the phase difference between voltage and current in L-C-R circuit at resonance?

If the nth term of an AP is (3n+5) then its common difference is a)2 b)3 c)4 d)5

By looking at which internal structure of a plant can you tell whether a plant is C_3 or C_4 ? Explain.

A capacitor and resistor are connected in series with an ac source. If the potential difference across C and R are 120 V and 90V respectively and if the rms current of the circuit is 3A, calculate (i) impedance and (ii) power factor of the circuit.

Two parallel Co-axial Coils of equal radius R and- numbers of turn N carrying equal currents I in same direction.are separated by a distance | R. Show that the magnetic field intensity B on the axis around the mid point between the coils is uniform over a very small distance as compared to R and is given by- B = (4/5)^(3/2) (mu_0IN)/R